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2 . ^ 5 SI H.5n§ in 1W>o O0#W #M*V oQfQ P1^^ UUULIULlLJIJ «|\^ » § g_^< Si I J *^ N r-t >* s—. V — K4. i • J , — —1 g . 7 9 ' g •? • £ 7— I > ^ N ^ ^ |=|§ |§ I 1 ^ ^ «^^> to'^"^"?^ R Q a f— —— ^i H . S^oc^o-^^ II 9 11 V? 11 T ? 1 os3000D0- OH: P H "% ^ -J os • ^ CN ^ s * I I I'I «.;©—• !0C " ^ h+> < < < S> ^ %< .XXDHJV«JHiJXa/_L ^ , I I s F" > > * > * 2 . ^\ N^ ,1 ii 5^ ^ ^ ^ <& -* ^ illllllii ^ ^t >^ ^ ^ * XPHPArHCTX \> J o o • o * — * r^^ Downloaded from https://www.cambridge.org/core. Biblio Université Pierre et Marie Curie, on 15 May 2018 at 06:33:09, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0035869X00018438 Os. Ucrope&Ti i ; -I fe 2, p Malay<damI !r Tkmil Veylorv ci 4* Ex 1 t uropesj h IX) Ikmil I o o I * (to Ceylon Iff* 4 European, 00. 00 3 1" I no I. •s N oi f Ceylon Downloaded from https://www.cambridge.org/core. Biblio Université Pierre et Marie Curie, on 15 May 2018 at 06:33:09, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0035869X00018438 JOURNAL THE ROYAL ASIATIC SOCIETY. ART. I.—On the Genealogy of Modern Numerals. Part II. Simplification of the Ancient Indian Numeration. By Sir E. OLIVE BAYLEY, K.C.S.I., C.I.E. THE second part of this paper will be occupied by an attempt to show how the ancient Indian system of numeral signs, described in Part L, was simplified. In other words, it will be attempted to show how this old system became the parent of that now used in India, which employs only nine units and a zero,—indeed of that system as used not in India alone, but now almost universally both in eastern and western countries. Since this simplification of the signs was the outcome of a reform in the system of numeration itself, it becomes necessary to deal to a large extent with the latter also. In entering upon this question however, it is necessary to premise that, as it has already been the subject of long and learned discussions by writers of the highest ability, it cannot be pretended in the present paper to examine it with any degree of completeness. Indeed, the literature of the question is in itself so extensive that it would be impossible, except after years of study and in the compass of a very considerable volume, to attempt an analysis of it,—much less to discuss completely the conflicting views held by many competent authorities. To those who desire to go more deeply into the subject, Dr. Moritz Cantor's Mathematische Beitrage (Halle, 1869) will afford a good view of it. From the information contained in this work it will be seen that I have borrowed largely, although I have not, in some material points, been able to accept the writer's views. VOL. XV.— [NEW SERIES.] 1 Downloaded from https://www.cambridge.org/core. Biblio Université Pierre et Marie Curie, on 15 May 2018 at 06:33:09, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0035869X00018438 2 THE GENEALOGY OF MODERN NUMERALS. At any rate, from the authorities cited in this work and in M. Woepcke's Traite sur 1'Introduction de l'Arithmetique Indienne en Occident, some notion may be formed of the extent of the field over which a full and complete inquiry should extend. All now attempted will be a sketch of the leading and more important facts, so arranged as to sustain a consistent theory for their explanation. It will be endeavoured to do this within the compass of an ordinary paper in the Society's Journal, without the omission of anything really material, but without entering upon any controversy. The conclusions formed will be submitted with the data on which they are based, to be accepted or rejected on their own merits. It may be said that on arriving at this point in the history of numerals, we are no longer under the necessity of depending almost entirely on inference and conjecture. Much positive evidence exists, though unfortunately on some points of a con- flicting nature. The task to be accomplished is to rearrange and reconcile it. Some of the direct testimony with which we have to deal is that of the early Arabic historians. This, with the indirect and undesigned proofs derived from the writings of the Arabic and Sanskrit mathematicians, forms by far the most important and trustworthy material avail- able. Other information, obtained from European sources, both ancient and mediaeval, will be also used, though some caution has to be used in dealing with the latter. The ground, as has been said, has long since been occupied by writers of the highest ability and most profound learning, such as Humboldt and Chasles, and by a writer whose acquaintance with Oriental mathematics is probably still un- rivalled—the late M. "Woepcke. Indeed, it may be admitted at once that the lines of the present paper follow closely those on which M. Woepcke has written his two papers on the subject, viz., the Traite sur l'Introduction de l'Arith- metique Indienne en Occident (Rome, 1859), and Sur la propagation des Chiffres Indiennes (Journal Asiatique, ser. 6, torn. i.). The question has since been carried somewhat further by M. Leon Rodet in his papers on the writings of Downloaded from https://www.cambridge.org/core. Biblio Université Pierre et Marie Curie, on 15 May 2018 at 06:33:09, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0035869X00018438 THE GENEALOGY OF MODEKN NUMERALS. 3 Aryabhata in the Journal Asiatique. Little more will be here attempted than to bring together the main items of the already existing evidence, and to use them together with some little recently discovered matter, in enforcing and carrying out to their legitimate conclusion the views of these two latter writers. Before, however, dealing with the subject as one of history, it is necessary to clearly understand the principle of the great reform to which it refers. It has been shown in Part I. that the old Indian system, as eventually established, employed twenty " self-contained " signs which, by the aid of a system of differentiation, were in fact capable of expressing any series of numbers—those at least likely to be used in the ordinary concerns of life.1 These were used without any reference, 1 It is not necessary to explain here the methods by which the still higher numbers used for mathematical calculations were expressed. It is sufficient for the present inquiry to take note of the early, and it may be said universal employment of the decimal arrangement. Nor is it necessary to dwell on the much wider question of the causes which led to its adoption. It is possible that there was a stage in the very early history of civilization, when mankind were more restricted in their power of numeration, as is the case to this day,with some of the savage races on the Andamanese Islands, who cannot count beyond three,—indeed indications may, perhaps, still be traced that such a condition once existed among the most highly civilized nations, and that even when this was exceeded they continued to count by groups of threes, —still it is certain that the extension of this power must have been one of the earliest steps in the progress of civilization. The system of numbering by decimal stages or'' rests " has been very generally supposed to have been suggested, at any rate, by the use of the human hand as an instru- ment to assist the process of reckoning numbers. Indeed, it is quite possible that the structure of the human hand suggested not only the decimal, but the earlier supposed methods of counting by 'triads,' or 'threes,' the quinary, the quaternary, and the duodecimal modes of numeration. The first being suggested by the ten fingers and thumbs of the joined hands, the second by the ' three' joints, the third by the four fingers, the fourth by the fingers and thumb of one hand (the Akkadian name for ' five' is synonymous with that for 'hand'; Pinches, Proc. Soc. Bibl. Arch., June, 1882), and the duodecimal by the multiplication of the 'three' joints by the four fingers. It is singular, too, that the Babylonian sexagesimal unit of ' sixty,' or Jus, will result from the further multiplication of twelve by five (perhaps better of 2x2x3x5 ; see Pinches, Proc. Soc. Bibl. Arch., June, 1882, p. 116), and the still further multiplication of this result by ' ten,' gives the Babylonian ' ner,' or ' six hundred.' At any rate, there are many curious facts which seem to indicate at least, this origin for the decimal system, and which also show the universal use of the human hand as a ' reckon- ing board.' It will suffice to mention a few of these only here. In Egypt, for example, in the hieroglyphic signs, the human hand and its portions were employed to signify measures of length. The cubit was divided into 'diti,' of which twenty-eight went to the royal, and twenty-one to the common cubit. One, two, or three ' diti,' were indicated by one, two, or three fingers respectively; four ' diti' by the human hand displaying four open fingers; five ' diti' by a similar figure with the thumb also displayed; six ' diti' by a closed fist; and eight by a reduplication of the sign for four ' diti.' Again, in general Downloaded from https://www.cambridge.org/core.
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